Journal
APPLIED PHYSICS LETTERS
Volume 97, Issue 12, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3491839
Keywords
barium compounds; bismuth compounds; crystal structure; electrostriction; internal stresses; materials preparation; phase diagrams; piezoceramics; potassium compounds; sodium compounds; X-ray diffraction
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Funding
- Hong Kong Polytechnic University [A-PH92]
- National Nature Science Foundation of China [10874069, 10704021]
- New Century Excellent Talents in University [NCET-08-0279]
- Natural Scientific Research Innovation Foundation in Harbin Institute of Technology [HIT.NSRIF 201055]
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Phase diagram of Bi0.5Na0.5TiO3-BaTiO3-K0.5Na0.5NbO3 ternary system has been analyzed and (0.94-x)BNT-0.06BT-xKNN (0.15 <= x <= 0.30) ceramics have been prepared and investigated. Pseudocubic structures were confirmed by x-ray diffractions and its preliminary Rietveld refinements. P-E, S-E, and S-P-2 profiles (where P, E, and S denote polarization, electric field, and strain, respectively) indicate electrostrictive behavior of all ceramics. The compositions with x=0.20 and 0.25 show pure electrostrictive characteristics. The dissipation energy, electrostrictive strain, and electrostrictive coefficient have been determined and compared with other lead-free and lead-containing electrostrictors. The electrostrictive coefficient can reach as high as 0.026 m(4)/C-2, about 1.5 times of the value of traditional Pb-based electrostrictors. (C) 2010 American Institute of Physics. [doi:10.1063/1.3491839]
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